rtc: cmos: remove useless cast for driver_name

Now the pnp_driver name is "const char *", there are no need to cast
driver_name.

Signed-off-by: Corentin Labbe <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>

drivers/rtc/rtc-cmos.c

···
 MODULE_DEVICE_TABLE(pnp, rtc_ids);
 
 static struct pnp_driver cmos_pnp_driver = {
-	.name		= (char *) driver_name,
+	.name		= driver_name,
 	.id_table	= rtc_ids,
 	.probe		= cmos_pnp_probe,
 	.remove		= cmos_pnp_remove,